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Sonicwall DMZ Question

I have a SonicWall NSA 240 with a Primary and Secondary internet connection, set for failover and load balancing.

I have 3 machines that only have external IPs and I need to add them to the DMZ for the secondary internet connection.  

I want to use X3-X5 as the ports for this, but can't seem to find out how to get it to work.  I've looked through the Admin Guide, so please don't post that, I can't find the answer in it.
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ben9035
Asked:
ben9035
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1 Solution
 
digitapCommented:
so, you need help setting up a secondary gateway?

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=7781

regarding wan failover:

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=7828

regarding the DMZ, are you wanting to give these three computers a public IP each?
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ben9035Author Commented:
They already have public IP addresses.  I've setup the secondary gateway already, and already created WAN failover.  I'm unable to get the external IPs working on interfaces X3-X5 because it keeps saying it's on the same subnet as X2 (secondary gateway).  SonicWall told me this was possible before I bought the product, but, big shocker, the 24x7 support I pay for isn't being answered by a technician right now.
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digitapCommented:
maybe they considered that you'd have those three ports in transparent mode.

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=5979

when you configure a port in transparent mode, the IP addresses MUST be in the same subnet as the WAN interface.

i've never configured the sonicwall in this method before, but it seems plausible.
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ben9035Author Commented:
I added a new address object, gave it a range of .xx1-.xx5 (open ips of subnet), tried to add the interface X3 in transparent mode to the DMZ zone, and I get the error:

Error: Transparent Range not in WAN subnet
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ben9035Author Commented:
Do the external addresses *have* to be a member of the primary WAN subnet, or can they be on the secondary?
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digitapCommented:
since you want to include three, i'd create an address object for each rather than a range.

i don't believe so.
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ben9035Author Commented:
don't believe they can be on the secondary?

I'll create addy obj for each and try....
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ben9035Author Commented:
Adding address objects for all 3 IPs and going that route didn't do anything.  I'm still getting the error.
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digitapCommented:
i've been doing some reading and i'm seeing where you cannot use transparent mode where you've configured WAN load balancing or failover.  i'll keep looking.
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digitapCommented:
i think that error is starting to make more sense.  if you've configured a port in transparent mode and have configured wan failover/load balance, the sonicwall must look at the primary gateway IP addresses when configuring the transparent mode settings.

you could possibly tell by disabling wan failover as a test, then try configuring transparent mode on the ports.
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ben9035Author Commented:
I've disabled the load balancing, but I don't see a selection for failover.  Is that automatic with two WAN connections?
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digitapCommented:
where are you configuring it?  under network > WAN Failover & LB?
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ben9035Author Commented:
Yes
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ben9035Author Commented:
Ok.  I switched primary and secondary gateways, and I got it to add.  I setup a static route for any service from lan subnets to use the secondary gateway (what WAS primary, much heftier connection), so that's good.  However, I can't ping from the machine that I got to use transparent mode.  Ideas?
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digitapCommented:
so, the clients on the LAN are able to ping to the internet, say, 4.2.2.2?

when you setup the transparent interface, did you use a range or a single IP?  do you have the subnet mask and gateway correct as well as DNS?
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ben9035Author Commented:
Yes, I'm on the connection now.

I used a single IP.  When I created the address object, I chose "DMZ" rather than "WAN", I didn't assign it a gateway or DNS as a result.  Should I have done WAN?
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digitapCommented:
in which IP subnet do you want the transparent (DMZ) hosts?  the WAN or secondary WAN?
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ben9035Author Commented:
WAN...now.  

Wait...should there be a static route to take the traffic coming from X3 and pushing it out, say, X1 Gateway, X1 interface?
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digitapCommented:
so, you configured an address object and gave it a public IP address within the subnet from WAN interface (but NOT the IP of the WAN interface), right?

then, you used that address object when you configured the transparent mode of the interface you used, right?

then, you configured the public IP assigned the address object to the workstation along with the subnet mask and gateway used for the WAN interface, right?

what DNS server have you used for the computer on the transparent port?
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ben9035Author Commented:
Yes

Yes

Yes

the ones for the WAN
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digitapCommented:
so, even after that, you can't ping anything on the internet?  say, 4.2.2.2 (public DNS)?
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ben9035Author Commented:
Nope.  I'm confused now.
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digitapCommented:
also, double check your firewall access rules.  what zone did you assign the transparent mode to?  make sure the access rules are allowing traffic.  if DMZ, then DMZ > WAN and WAN > DMZ.
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digitapCommented:
the steps say that you can also use either the ISP gateway (the one configured on your WAN interface) or the IP address assigned the WAN interface.

try changing this on your computer and let's see what happens.
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ben9035Author Commented:
firewall rules are good to go.

you're talking about for the gateway on the pc right?
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ben9035Author Commented:
Nothing.
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digitapCommented:
yes.

hmmm.  wished i could get a look at the config.
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ben9035Author Commented:
It's really weird.  If I unplug the WAN interface, plug it into a switch, and plug the cable from the PC into the switch, everything works fine.

Kind of smells like a routing problem doesn't it?
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ben9035Author Commented:
Also, in the interface table, next to X3, it has the WAN ip listed, NOT the ip that I put into the address object.  Is that normal?
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digitapCommented:
yes, it does seem a route is not correct.  either that or a misconfiguration.  double check the address object assigned to the x3 interface.  did you configure it as a host?
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ben9035Author Commented:
Name: DMZ1

Zone Assignment: DMZ

Type: HOST

IP: in the same subnet as WAN
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ben9035Author Commented:
X3 IP            Any           Any             X1 Default Gateway               X1         1           9    
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digitapCommented:
make the address object part of the WAN zone.
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ben9035Author Commented:
Tried, nada.
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digitapCommented:
i'm stumped.  it seems you followed the KB exactly.  i'm not sure what's left without seeing it.

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=5979
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ben9035Author Commented:
Understandable.  Thanks a lot for all your help anyway.
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digitapCommented:
sure.  obviously, i'll keep monitoring it.  when sonicwall's 24x7 support responds and IF they fix it, let me know what they figure out.
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digitapCommented:
also, if i think of something else, i'll post.
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ben9035Author Commented:
I'll definitely do that.  
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ben9035Author Commented:
The problem came down to the machine not being registered in the ARP cache.  I manually set an entry for it, went to dinner, then came back, checked the entry, tried to ping, no luck.  Called SonicWall support back, finally got someone, they logged in, removed the manual ARP entry, and everything started working fine.  Other than that, as you indicated, the configuration was definitely correct.  

I had a similar problem this morning with the Video Conferencing system that was also to be placed in the DMZ, I did the same things, added the proper routing entry, and everything worked on it as well.

Thanks again for all your help.
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digitapCommented:
thanks for posting the full solution and glad you got it working!
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ben9035Author Commented:
Full description of problem and solution are within answer.  Digitap tried to help me resolve, but we never came to a conclusion.
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